2k1 was my favourite of them all. Well, I've only played 2k, 2k1, 2k5, and 2k6. 2k6 got old after two coffeebreaks.
2k1 was fun, all you do was get Vince Carter, cross over the defender and boom, hit 3 after 3 after 3.
But none of those holds a candle to skies of arcadia.... or jet grind radio... or thps1.